Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-29T07:36:40.935Z Has data issue: false hasContentIssue false
  • English
  • Français

Fracture of B2 Aluminide Single Crystals

Published online by Cambridge University Press:  26 February 2011

Kehi-Minn Chang ,
R. Darolia  and
H.A. Lipsitt
Kehi-Minn Chang
Affiliation:
Ge Corporate Research and Development, Schenectady, NY 12301
R. Darolia
Affiliation:
GE Aircraft Engines, Evendale, OH 45215
H.A. Lipsitt
Affiliation:
Wright State University, Dayton, OH 45435
Get access

Abstract

Single crystals of B2 aluminides, including FeAl, NiAl, and CoAl, were tested to investigate their fracture behavior. Specimens were aligned along specific orientations of the crystal lattice. Both uniaxial tension and notched bend tests revealed a cleavage fracture in all crystals. The cleavage occurred along a specific crystalline plane: {100} for FeAl; {110} for NiAl and CoAl. A model based on the ordering energy of unlike atoms is proposed to explain the preferred cleavage plane in these B2 structures. Fracture on transient planes around {115} are observed in NiAl before the crack growth continues on a cleavage plane.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 213: Symposium Q – High-Temperature Ordered Intermetallic Alloys IV , 1990 , 597
Copyright
Copyright © Materials Research Society 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. , G. Sauthoff: Z. Metallkde., 1989, v. 80, pp. 337–344.Google Scholar
2. Pope, D.P.: “Structural Uses for Ductile Ordered Alloys,” DARPA Report NMAB- 419, Aug. 1984.Google Scholar
3. Chang, K.-M. and Catharine, D.A.: “Rapid Fracture Toughness Measurements,” GE-CRD Report 90CRD154, Aug. 1990.Google Scholar
4. Field, R.D., Lahrman, D.F., and Darolia, R.: submitted to Acta Metall.Google Scholar
5. Loretto, M.H. and Wasilewski, R.J.: Phil. Mag., 1971, v. 23, pp. 1311–1328.CrossRefGoogle Scholar
6. Gilman, J.J., Fracture of Solid, p. 541 49, Interscience Publishers, New York (1962).Google Scholar
7. Russell, S.M. et al. , “Lightweight Disk Alloy Development,” USAF/AFWAL Report FR-19577–9, May 1989.Google Scholar